package lab02.test36;

public class Undergraduate extends  Student{
    @Override
    String calGrade() {
        //得到该生的平均成绩
        double avg=calAverage();

        if(avg>=80&&avg<=100)
            grade="优秀";
        else if (avg>=70&&avg<80)
            grade="良好";
           else if (avg>=60&&avg<70)
     grade="一般";
           else if (avg>=50&&avg<60)
               grade="及格";
           else
               grade="不及格"
            ;


        return grade;
    }
}
